From TOMS, the Ionie Nubuck Suede Moto Booties feature: Nubuck suede upper Side zipper closure and lateral gusset detail for easy on and off Slotted shaft buckle strap and vamp buckle strap Custom CloudBound™ foam insole for all-day comfort and support: made with 40% eco content (20% recycled polyurethane, 10% bio-oil, 10% recycled rubber) TPR welt and midsole TPR outsole with rubber lug Approx. 6" shaft height Approx. 11.75" shaft circumference Approx. 1.5" heel height Imported.